Name: イタリアの橋は死傷者の工学上の間違い及び結果が原因で崩壊する｜設計された災害 (Bridge In Italy Collapses Due To Engineering Mistake & Results In Casualties | Disasters Engineered)
Uploaded: 2021-01-14T10:34:16.000Z
Duration: 7 min 46 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

An article in Les Stampa newspaper stated that the bridge is concrete structure won't need any maintenance.

基礎受動態

Neither will the concrete stays, which are protected from atmospheric agents by their concrete vest.

The deck, suspended 45 meters above the ground below three reinforced concrete pylons reached 90 meters.

High design featured diagonal cable stays with trestle like supports, one said, carrying the roadway deck while the other supported the top ends of the diagonal stay cables.

So beneath it there was a railway depot, a river, a densely populated area and several large factories.

It was a signature Marandi design, with every cable completely encased, giving the bridge a complete concrete look.

Pre stressed concrete is compressed during its manufacturer.

Cables or tendons are stretched, placed under tension on then concrete cast around it, creating a stronger structure that's more resilient.

Concrete is a material which is made up of cement on aggregate because it's sort of a granular material.

It is very, very poor when you stretch it.

Okay, so it's good and compression, we contention.

Okay, The bridge was as busy as normal, although the traffic had slowed due to the torrential rainstorm at the time.

At 11:36 a.m. a 200 meter section of the Marandi Bridge deck collapsed along with support pillar nine, bringing with it.

The vehicles and passengers traveling across many tons of concrete, along with more than 30 cars and three trucks, plummeted into the culture of era river, the nearby industrial area and railways below.

The collapse cost the lives of 43 individuals, injured 16 and devastated the people of Genoa.

Some apartment buildings and houses under the bridge were crushed.

Others had to be evacuated as the remaining sections of the bridge hung precariously above.

The people who live here have no idea if all when they might be able to return.

We were talking thio some locals a little earlier on you said that this bridge, which isn't only used by the people of the city to get from one side of the city to the other but is also a major highway.

So if you're driving from France into Italy on on down through Italy.

You could see a heavy lifting heavy lifting machinery.

They're digging through what waas, one of the main buttresses that held up the bridge.

It was only one part of the bridge which collapsed.

That part was complex a structural system off struts on dhe towers that were deteriorating with time.

The Italian transport minister described the incident as an immense tragedy.

It had bean his party in 2012 that had said that the idea of the Miranda Bridge collapsing was just a fairy tale.

The government is now inspecting the safety of bridges and roads, not just in general but across Sicily.

They've promised investment in infrastructure and 30 million euros to support those affected in general.

Before they can rebuild, they need to remove tons of concrete and twisted steel.

Small memorials like this is being set up across the city, candles left to burn until they've gone in memory of those that went on to this bridge and never came back.

Clearly there is grieving going on in this city, but alongside it now.

There is a lot of anger, people are very, very angry that this bridge was not looked after in the way that they think it should be.

For up to a decade now, people have been worried about it, and I've been calling for repairs or even for its removal together in a new bridge to be built by the engineer that predicted years ago that the Marandi Bridge had problems, doesn't think it'll take months.

He thinks it will take years first, the moment they have to demolish the bridge, which is a very challenging final.

An innovative method was used as part of the demolition.

45 meter high walls of water were used to enclose a potential dust cloud.

Thousands of people were evacuated from a 300 meter exclusion zone before the remaining towers were brought down.

Bridge consists of one or more towers and a deck that is supported by cables that run directly to the towers.

A cable stay bridge requires a bigger, larger, more active deck structure.

The fact that the cables are connected, the deck means that the deck has to be a lot more strong to take the load.

Most cable state bridges have multiple stays that attached to different points on the deck.

The Marandi Bridge only had to a tower, meaning that a failure in one single stay could compromise the entire structure.

There had bean concerns over the bridge since its construction.

Miranda himself recommended protection against pollution from the factories on the salty sea air.

In 1979 Marandi wrote a report that recommended constant maintenance of the bridge.

In 1992 the cables were heavily corroded.

The then state owned company Auto Start added new cables around the corroded ones rather than replacing the existing cables.

In 2016 it was brought to minister's attention in Parliament that the Miranda Bridge needed attention, and in 2018 plans were set in motion for retrofit maintenance, and it was due to start in the autumn in their first public encounter with the media out of Strata Pair Italia, the company that runs the bridge, committed to an ambitious timeline eight months to rebuild it, they said.

Prosecutors claimed during the subsequent investigation that some parts of the bridge had gone without maintenance for 25 years.

Auto Strada say the bridge was constantly monitored and subject of frequent inspections.

They claim there was no indication that immediate action was needed.

 The investigation is yet to be completed on no prosecutions have Bean made. 